Integrating the BlackBerry MVS with a PBX
Music on hold
On your organization's PBX, you can configure the music on hold feature so that users who are placed on hold hear music or a recorded message that contains information about the organization. However, if you configure music on hold and a local PBX user is in a call with multiple parties, if the user puts the call on hold, all parties hear the music on hold. Your organization must carefully consider how you configure music on hold so that calls with multiple parties are not disrupted.
The BlackBerry Mobile Voice System includes a Move Call From Desk feature, which allows a user on a Cisco Unified Communications Manager to move an active desk phone call to a BlackBerry device. The process of moving the call includes placing the call on hold. Users should be aware that if music on hold is configured for their line, when they move the call, music will play for a brief period of time while the call moves.
The BlackBerry Mobile Voice System might require additional licensing of various components of the PBX or gateway. Consult with the project manager for your installation to determine the requirements that apply in your organization's environment.
To achieve the correct distribution of BlackBerry Mobile Voice System users across multiple Cisco Unified Communications Manager nodes or clusters, you should use multiple telephony connectors to balance the distribution of your organization's users. In the case of a Cisco Unified Communications Manager node failure, verify that you have sufficient registration capacity on other nodes to accommodate the failed node. For more information about registration capacity, refer to the documentation from Cisco.
BlackBerry device–initiated calling
To support BlackBerry device-initiated calling for users, you must configure a DID/DDI number on the PBX. This number must be unique and dedicated to the BlackBerry Mobile Voice System. During the setup of a BlackBerry device-initiated call, the BlackBerry MVS Client calls the DID/DDI number that you configure.
To support PBX-initiated calling, you must configure an ANI number on the PBX. This number must be unique and dedicated to the BlackBerry Mobile Voice System. During the setup of a PBX-initiated call, the PBX uses the ANI number to call the BlackBerry device. Part of the BlackBerry MVS provisioning information that the BlackBerry MVS Server sends to the BlackBerry device includes the ANI number so that the BlackBerry device is aware of the number that will call. When the inbound call reaches the BlackBerry device, the last six digits of the ANI number must exactly match the last six digits of the ANI number that the BlackBerry MVS Server sent with the provisioning information before the BlackBerry MVS Client on the BlackBerry device will treat the inbound call as a BlackBerry MVS call.
You can configure optional ANI numbers for situations where the wireless network alters the calling party number field and therefore the PBX does not use the unique ANI number to call the BlackBerry device. Part of the BlackBerry MVS provisioning information that the BlackBerry MVS Server sends to the BlackBerry MVS Client includes the optional ANI numbers so that the BlackBerry MVS Client has a record of the numbers that can call. When the inbound call reaches the BlackBerry device, the last six digits of the ANI number must exactly match the last six digits of one of the optional ANI numbers that the BlackBerry MVS Server sent with the provisioning information before the BlackBerry MVS Client on the BlackBerry device will treat the inbound call as a BlackBerry MVS call.
Choosing between BlackBerry device–initiated and PBX-initiated calling
If your organization uses devices that operate on CDMA networks, BlackBerry device-initiated calling offers optimal performance and reliability for BlackBerry Mobile Voice System calls.
If your organization uses devices that operate on GSM networks, PBX-initiated calling offers optimal performance and reliability for calls made using BlackBerry devices.
In countries where the calling party pays for calls because inbound calls to mobile devices occur with no charge to the mobile phone user, configuring the BlackBerry MVS for device–initiated calling might provide cost savings for BlackBerry MVS users. This is because the rates for mobile to fixed calls are lower than the rates for fixed to mobile calls.